SOLUTION: At Joanna’s Clothing store, 100 T-shirts were sold for a total of $1440. If the T-shirts were priced at either $12 or $20, how many of each type was sold

SOLUTION: At Joanna’s Clothing store, 100 T-shirts were sold for a total of $1440. If the T-shirts were priced at either $12 or $20, how many of each type was sold

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Question 1177062: At Joanna’s Clothing store, 100 T-shirts were sold for a total of $1440. If the T-shirts were priced at either $12 or $20, how many of each type was sold
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
x at $12
100-x at $20
so 12x+20(100-x)=1440
12x+2000-20x=1440
-8x=-560
x=70 at $12 or $840
100-x=30 at $20 or $600
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